How do i display how long I have been logged in each day?

giantpanda

Note: The command is depended on the wtmp file: https://en.wikipedia.org/wiki/Utmp

To display daily statistics for your login account only. Hours, minutes.

$ ac -d
Jul  3	total       13.52
Jul  4	total       66.23
Jul  6	total      129.23

To print your total login time.

$ ac
	total    12894.55

To display all users total login time.

$ ac -p